Laboratory of Cold Atoms Near Surfaces


Speed of light in everyday life - GSM mobile phones

Our popular science paper titled Should we bother with the speed of light in everyday life? A closer look at GSM technology has been published in Physics Education. It may be downloaded here.

We explain shortly how the speed of light – being incredibly high – affects the operation of the GSM mobile phones system. On this basis it is easy to understand what is the origin of the division of the area into “cells” and what is the physics behind it.

We also show how to learn what does the mobile phone transmit. This might be an interesting exercise during physics lessons.